var head_left_a=document.getElementById("head_left_a");
var head_l_a=document.getElementById("head_l_a");
var head_right_a=document.getElementById("head_right_a");
var head_r_a=document.getElementById("head_r_a");
var content_right_l=document.getElementById("content_right_l");
var content_r_lx_a=document.getElementById("content_r_lx_a");
var content_r_lxff_a=document.getElementById("content_r_lxff_a");
var content_r_l_p=document.getElementById("content_r_l_p");
var content_r_gs_a=document.getElementById("content_r_gs_a");
var content_r_zj_p=document.getElementById("content_r_zj_p")
var content_r_zj_a=document.getElementById("content_r_zj_a");
var content_r_cz_p=document.getElementById("content_r_cz_p")
var content_r_cz_a=document.getElementById("content_r_cz_a");
var content_r_yb_p=document.getElementById("content_r_yb_p");
var content_r_yb_a=document.getElementById("content_r_yb_a");
var content_r_yx_p=document.getElementById("content_r_yx_p");
var content_r_yx_a=document.getElementById("content_r_yx_a");
var matter_p2=document.getElementById("matter_p2");
content_right_l.addEventListener('mouseover',
    function(){
        content_r_lx_a.style.display='none';
        content_r_lxff_a.style.display='block';
        content_r_l_p.style.display='none';
        content_r_gs_a.style.display='block';
        content_r_zj_p.style.display='none';
        content_r_zj_a.style.display='block';
        content_r_cz_p.style.display='none';
        content_r_cz_a.style.display='block';
        content_r_yb_p.style.display='none';
        content_r_yb_a.style.display='block';
        content_r_yx_p.style.display='none';
        content_r_yx_a.style.display='block';
        head_left_a.style.display='none';
        head_l_a.style.display='block';
        head_right_a.style.display='none';
        head_r_a.style.display='block';
        content_left_p.style.display='none';
        content_l_p.style.display='block';
        matter_p.style.display='none';
        matter_wz_p.style.display='block';
        matter_p2.style.display='none';
    })
content_right_l.addEventListener('mouseout',
    function(){
        content_r_lx_a.style.display='block';
        content_r_lxff_a.style.display='none';
        content_r_l_p.style.display='block';
        content_r_gs_a.style.display='none';
        content_r_zj_p.style.display='block';
        content_r_zj_a.style.display='none';
        content_r_cz_p.style.display='block';
        content_r_cz_a.style.display='none';
        content_r_yb_p.style.display='block';
        content_r_yb_a.style.display='none';
        content_r_yx_p.style.display='block';
        content_r_yx_a.style.display='none';
        head_left_a.style.display='block';
        head_l_a.style.display='none';
        head_right_a.style.display='block';
        head_r_a.style.display='none';
        content_left_p.style.display='block';
        content_l_p.style.display='none';
        matter_p.style.display='block';
        matter_wz_p.style.display='none';
    });